python3.12 issue with setuptools

[Tony Chia]

python3.12 has removed setuptools when a virtualenv is created 

When i created a new venv with python3.12 and install JJB 6.2.0, the jenkins-jobs test command fails

❯ jenkins-jobs test if_publisher.yml
ERROR:stevedore.extension:Could not load 'delete': No module named 'pkg_resources'
ERROR:stevedore.extension:Could not load 'delete-all': No module named 'pkg_resources'
ERROR:stevedore.extension:Could not load 'get-plugins-info': No module named 'pkg_resources'
ERROR:stevedore.extension:Could not load 'list': No module named 'pkg_resources'
ERROR:stevedore.extension:Could not load 'test': No module named 'pkg_resources'
ERROR:stevedore.extension:Could not load 'update': No module named 'pkg_resources'
Traceback (most recent call last):
  File "/Users/tonychia/jjb/venv_312/bin/jenkins-jobs", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/tonychia/jjb/venv_312/lib/python3.12/site-packages/jenkins_jobs/cli/entry.py", line 177, in main
    jjb = JenkinsJobs(argv)
          ^^^^^^^^^^^^^^^^^
  File "/Users/tonychia/jjb/venv_312/lib/python3.12/site-packages/jenkins_jobs/cli/entry.py", line 60, in __init__
    self.parser = create_parser()
                  ^^^^^^^^^^^^^^^
  File "/Users/tonychia/jjb/venv_312/lib/python3.12/site-packages/jenkins_jobs/cli/parser.py", line 112, in create_parser
    extension_manager.map(parse_subcommand_args, subparser)
  File "/Users/tonychia/jjb/venv_312/lib/python3.12/site-packages/stevedore/extension.py", line 276, in map
    raise NoMatches('No %s extensions found' % self.namespace)
stevedore.exception.NoMatches: No jjb.cli.subcommands extensions found

When I manually pip install setuptools, then the "jenkins-jobs test if_publisher.yml

" passes. 

Can we add setuptools as a dependency to jenkins-jobs-builder so we only need to run one pip install command to install everything in an empty venv? 

steps to reproduce:

1) python3.12 -m venv venv_312

2) source venv_312/bin/activate

3) pip list 

verify no setuptools package is installed 

https://docs.python.org/3/whatsnew/3.12.html

• gh-95299: Do not pre-install setuptools in virtual environments created with venv. This means that distutils, setuptools, pkg_resources, and easy_install will no longer available by default; to access these run pip install setuptools in the activated virtual environment.

4) pip install jenkins-job-builder==6.2.0

5) jenkins-jobs test if_publisher.yml 

and observe the error show above

❯ cat if_publisher.yml
- job-template:
    name: 'test-job-{variant}'
    triggers:
      !j2-yaml: |
      {% if discard_old_builds|default(false) %}
      - timed: "@daily"
      {% else %}
      - timed: "@weekly"
      {% endif %}

      {% if variant == "def" %}
      - github
      {% endif %}

- project:
    name: test-project

    jobs:
    - 'test-job-{variant}':
        variant: abc

    - 'test-job-{variant}':
        variant: def
        discard_old_builds: true

6) pip install setuptools 

and run jenkins-jobs test if_publisher.yml 

 observe the issue went away

Tony